If you're looking to combine all your iCal-feeding calendars—and you're not, say, a Google or Yahoo Calendar user—MashiCal could be your solution, as well as a way to separate your shared feeds from personal stuff.

The site claims to be able to handle pretty much any feed or file you give it with the .ics extension, and it worked for at least two Google Calendar feeds and an exported ICS. If you're trapped using separate calendar services and want a combined view, or want to offer up a whole bunch of feeds to a group, MashiCal could surpass Google and Yahoo for the sign-up/setup/share hassle alone. Better still, MashiCal doesn't require a new sign-up, as it can log you in with your Google, Facebook, OpenID, and a few other credentials.

MashiCal is free to use, requires a login with a third-party account to use. Check out a video demonstration of MashiCal combinations below: